Instrumentation Reference
4
–
20 mA
Cheat Sheet
Enter any variable — all results update instantly
Inputs — edit any field
Scale
PSI
Pressure
PSI
Voltage
V
Current
mA
↑ whichever field you type in drives all calculations
Calculated
Pressure
90
PSI
P = (V−1) ÷ 4 × Scale
Calculated
Voltage
3.4
V
V = P ÷ Scale × 4 + 1
Calculated
Current
13.6
mA
I = P ÷ Scale × 16 + 4
Calculated
% of Scale
60
%
% = P ÷ Scale × 100
Pressure from Volts
P = (V − 1) ÷ 4 × Scale
Volts from Pressure
V = P ÷ Scale × 4 + 1
Current from Pressure
I = P ÷ Scale × 16 + 4
Pressure from Current
P = (I − 4) ÷ 16 × Scale